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Stock-based Compensation - Performance Units (Detail)	12 Months Ended
	Dec. 31, 2021 shares
Year Twenty Twenty One [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target number of shares	843,000
Year Twenty Twenty [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target number of shares	500,500
Year Twenty Nineteen [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target number of shares	489,800
Year Twenty Eighteen [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target number of shares	310,700
Year Twenty Seventeen [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target number of shares	186,198
Year Twenty Sixteen [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target number of shares	185,000

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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